Ludwig was running two different mufflers that I know of (probably more) during this time frame (70s). Both were almost identical. The thing is, the mounting was just slightly different on them. One had a more "relaxed" feel on the tension. The other placed the screws closer together which put more tension on the unit.

Thanks RogerSling, The one on the right looks like what I'm looking for.

Thanks for the pics. I need 3 of them. I'll post in the Wanted Sec.

youre probably looking for the large knob mufflers for those. just check your mufflers holes. wherever the larger hole is, is where the knob part goes through. the smaller hole is for the small machine bolt that goes through for the mounting. there are usually some on ebay. they have been running in the 20 ish range each..

mike

If you don't need to be historically accurate, Pearl makes a similar looking muffler that mounts easily in the Ludwig toms for about $5 each new.

http://www.musiciansfriend.com/drums-percussion/pearl-internal-muffler-734?tandt_rdir=1&nN=true